Bed with mattress



FIG. 1 is a perspective view of a bed with mattress showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings depict portions of the bed with mattress that form no part of the claimed design. 

CLAIM We claim the ornamental design for a bed with mattress, as shown and described. 